Can How ‘I.Q’ can be measured ?

‘I.Q’ not same to all . It’s different with persons. ‘I.Q’ is more… ‘intelligence’ is more .Conversely ,
‘I.Q’ less ‘intelligence’ less.
‘I.Q’ is ratio between ‘Mental age’ and the ‘chronological age’ of person. Multiplied by 100 .
Mental age x 100 .
I.Q = Chronological age

What’s ‘Mental age’ ? what’s ‘ Physical age’ ?
Mental age means …assume a 10 yrs boy .His mental activities like …Intelligence , memory , creativity in solving problems. Judgment about good and bad . Decisive power. Equal to 20 yrs person … then his ‘ Mental age’ is 20 yrs. It’s the ‘intellectual’ factor.
‘Chronological age’ means …physical age . It’s the actual age of the person .If the age of a boy is 10 yrs…his chronological age’ is 10 yrs . It’s physical factor.


His mental age
The ‘I.Q of above boy = ------------------- x 100
chronological age .

His mental age =20 yrs
His chronological age =10 yrs.

His ‘I.Q’ = 20 x100= 200
10
If ‘I.Q’ is 140 + - intelligent.
90- 110 - average intelligence.
50 – 70 - dull

If ‘I.Q’ is 180 .- genius .
Those people will come under genius .